The coefficients of the significant independent variables are provided in Tables 2 and 3 for the grids Brabant and Noord, respectively, at the 5% significance level.We observe that a national holiday has a large and significant negative impact on the electricity
infeed during the weekdays. The effect of national holidays on the weekends, although still negative, is much smaller and typically insignificant during the night time. In addition, less electricity is used in the evening before a holiday and in the morning
after a holiday. This is a surprising effect and is primarily driven by Dutch working habits. The occurrence of a bridge day before a holiday only has an effect on the electricity infeed in the evening,